welcome to HCM.
the Xray shows an opacity in the left lower lung.
you need to elaborate on all the symptoms and problems before I can comment. pl. mention if you have fever
, breathlessness, sputum production, weakness etc.
precautions depend on the cause.
can you please load your Xray here using uploading facility provided here?
you need urgent evaluation in of the opacities wit h a chest physician.
take care and keep me posted on your progress.
Good luck !